need help understanding

i need help understanding, or for that matter, why my little "lippy" died.
about 10 days ago, i discovered that my white lip python had belly rot, so i imediately put lippy in another aguarium on paper towels, and treated her with repti wound. i cleaned lippy daily, applying repti wound, then a couple times with neosporin. i actually saw an inprovement, and was glad. but i got off work today and found that lippy has passed on.
could it be that she was just to stressed out from me treating her?
could it be the new substrate that i gave lippy 2 weeks ago? its called peat moss by premier, i even called the 800 # to make sure it was safe to use on reptiles, and they said it is ok because its all natural and theres no chemicals in it. so i used it and noticed that it retained alot of the water from misting, and when lippy shedded, it was stuck in her belly scales. could this be what killed lippy?
lippy was a wc from lll reptiles, i got lippy 9 months ago. could it be because lippy was straight from new guinnea?
i need to find out if it was something i did so can prevent this from happening again.
thanks for reading, and any feed back will be greatly appreciated.


RIP lippy.

josh